How to convert type known at runtime to a List of given type?

I have a type that I only get to know at a runtime:

Type givenType = FindOutTypeOf(someObject);

and I have following method:

public void SomeMethod(Type type);

that I need to call it with the List<givenType> type.

How to convert a given type (that I got to know at runtime) to a list of a given type?